What was found
BURNING RUBBER SMELL AND SMOKY HAZE IN COCKPIT. INSPECTED BOTH E/E AND A/C PACK BAYS, AFT AIRSTAIRS, GEAR WELLS, FWD BELLY SNAKE PIT, CAPT AND F/O INSTRUMENT PANEL, OVERHEAD PEDESTAL, C/B RACKS AND RUDDER PEDAL AREA, CHECKED GASPER FAN OPERATION. W/APU RUNNING OPERATED BOTH PACKS, RAN ALL 3 ENGINES AND PERFORMED PNEU AND A/C CHECKS. FLT CREW SIMULATED T/O AND CLIMB POWER SETTINGS, NO DEFECTS NOTED. CHECKED AIR PRESSURE FILTER PER M/M.